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CAP explains why your global DynamoDB table shows stale inventory and why Aurora Global reads lag 80 ms behind the writer. This guide maps partition tolerance, consistency, and availability trade-offs to concrete AWS controls.
July 2026 field note: Aurora failover windows still force app timeouts above tens of seconds; DynamoDB hot partitions and short transactions remain the scaling levers, with a partition-math worksheet you can reproduce.
Palaniappan PA guide to microservices patterns on AWS: what to use, what to skip, and what changed in 2026 (App Mesh EOL, VPC Lattice, Powertools idempotency, Step Functions sagas).
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